3.44 A horizontal curve on a single-lane freeway ramp is 400 ft long, and the design speed of the ramp is 45 mi/h. If the superelevation is 10% and the station of the PC is 18+ 25, what is the station of the PI and how much distance must be cleared from the center of the lane to provide adequate stopping sight distance?

3.44 A horizontal curve on a single-lane freeway ramp is 400 ft long, and the design speed of the ramp is 45 mi/h. If the superelevation is 10% and the station of the PC is 18+ 25, what is the station of the PI and how much distance must be cleared from the center of the lane to provide adequate stopping sight distance?

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Curve setting

A curve is a turn that is provided horizontally or vertically in the design of highways, railways, and runways. A curve connects two straight lines that are separated by the deflection angle. It helps to change the direction and alignment of the highways, railway tracks, and runways. Therefore, the gradual change in their alignment is made by using a curve to provide comfort to the passengers and this also provides an easy turn to change the direction of the moving vehicle.

Question

3.44 A horizontal curve on a single-lane freeway ramp
is 400 ft long, and the design speed of the ramp is 45
mi/h. If the superelevation is 10% and the station of the
PC is 18+ 25, what is the station of the PI and how
much distance must be cleared from the center of the
lane to provide adequate stopping sight distance?

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